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Eclipse Class R is not built for my Android projects

My system crashed and I had to reinstall all my software. Now just how, ..... half of my android projects will be built. It seems that the class R is not under construction. I used to have this question, but it seems that it somehow disappeared.

I am using eclipse.

I tried everything, built a project, cleaned it, and then it builds, nothing works!

error setContentView (R.layout.factlist); R cannot be authorized for verification

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3 answers

This happens to me too very often. In the general case, when R.java disappears, it means that there is an error in your project (which prevents the creation of this file).

Check carefully if everything is in order, especially in your resource files (XML files). Eclipse can help you determine what is wrong with the Problems window.

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There are two main reasons for this. Either your import statement to import R, or there is an error in the XML file. At the top, if your class, make sure you do the following:

 import your.pacakge.R; //make sure its not import android.R;

If this does not work, check the XML file that you are running. Make sure it has no errors (open tags, tags with errors, etc.)

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R.java will be automatic .

First of all, you solve other errors of your project that are not related to R.java .

When you solve all other errors, your R.java will be created automatically.

If you still cannot remove the errors.

Just comment code with errors except R.java

Then, one by one, delete the comments and resolve your mistakes.

Hope this helps you ...

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Source: https://habr.com/ru/post/921847/

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